Conexant Systems, Inc.

Skyworks Solutions, Inc.

Christian Levesque

Joseph Hubert Colles

Paul A Underbrink

Kelly H Hale

Daryush Shamlou

Patrick D Ryan

Guang-Ming Yin

A system for wireless communications is provided. The system includes a hand-held wireless communications device, such as a cell phone. An antenna is connected to the cell phone. The antenna radiates radio waves over an area of less than 360 degrees of arc, such as in a cardioid or hemisphere. The antenna is oriented such that hemisphere is in the direction away from a head of a user of the cell phone.

Directional antenna for hand-held wireless communications device

Wireless communications system utilizing directional wireless communication device

An improved battery management circuit and system are disclosed. The improved battery management system relates to the type having at least one battery cell that is connected in a circuit with battery powered components, a current sensing resistance that is located in series within the circuit, voltage measurement circuitry that measures the voltage that develops across the current sensing resistance in proportion to the current flowing through the resistance, a cutout switch that is located in series within the circuit, and means for opening the cutout switch when the measured voltage is too high. The improvement is a single circuit element which functions as the current sensing resistance and as the cutout switch, the single circuit element having first and second electrodes and a control electrode that turns the first and second electrodes 'on' and 'off' and wherein the current sensing resistance is an on-resistance between the first and second electrodes.

Battery management system with current measurement across on-resistance

Growing community of inventors

Fountain Valley, CA, United States of America

Christian Levesque